when you leave a friends house, do you just get up and leave? or do you say goodbye for the attention?
how about because its the polite thing to do, and you have a lot of friends that might want to know.
shipper has been around a long time. the respectful thing to do is to wish him well.
if you dont approve of people saying good by, you could just keep your mouth shut. as the old saying goes, if you have nothing nice to say, dont say anything at all. at least 'what most "adults" do.